Rotations Page 1: Exploring Polygon Rotation and Intersections

① This GeoGebra example demonstrates the dynamic rotation of a polygon around a point, showing how its sides intersect with the original figure as the rotation angle changes. ② Core mathematical concepts include planar rotation transformation, polygon properties, and intersection of geometric objects, emphasizing the effect of rotation angle on position. ③ Construction highlights: uses the Polygon command to create polygon poly1 with vertices A, B, C; employs Textfield to create three input boxes (InputBox1, InputBox2, InputBox3) for entering rotation parameters; applies the Intersect command to compute intersection point D between the rotated and original figures, enabling interactive exploration. ④ Suitable for middle and high school students learning geometric transformations, and for teachers demonstrating rotation concepts in class, helping students understand rotation center, angle, and corresponding points.